Crumb Version:
Start with whatever scraps you have and see what sizes you can come up with. Remember you can also piece scraps to make them big enough to cut a unit out of too!
Take (4) 2.5″ x 4.5″ Center Square fabrics and (4) 2.5″ x 4.5″ background fabrics. Pair and sew right side to right side along the long edge using a 1/4″ seam allowance.